Ellie via Postfix-users:
> Dear postfix users community,
>
> Sorry for asking another beginner question. I've seen solutions online
> for this, but only one with caveats.
>
> One of my setups involves a forwarding SMTP that handles external
> domains, that then forwards them to some other internal mailbox on a
> different machine. To do that, I use postfix with virtual_alias_maps to
> forward it. I've seen that use case also used to implement catch-alls.
>
> The problem: postfix sets Delivered-To for the final target address it
> forwards to. However, it doesn't seem to keep the original envelope-to.
Postfix will prepend X-Original-To if it does the aliasing
AND delivery. It won't prepend that when forwarding mail.
You can force this witH;
/etc/postfix/master.cf
relay .. .. .. .. .. .. smtp
flags=O
/etc/postfix/main.cf:
relay_destination_recipient_limit = 1
transport_maps = hash:/etc/postfix/transport
/etc/postfix/transport
example.com relay:[internal-mailhub.example]
http://www.postfix.org/smtp.8.html
http://www.postfix.org/postconf.5.html#transport__destination_recipient_limit
You should not prepend the header with multi-recipient deliveries,
because that is a privacy problem.
Wietse
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